Moog Music Forum

Hi Mooguys.

Last week-end, patching around, I noticed the square LFO output of theCP-251 did not trig the EHX 8StepProgram, while the LFO output on the VX-351 did. As per the CP manual, the LFO signal is going from -2.5V to +2.5V.

What about hte Voyager's LFO output signal?... Is it 0V to 5V?
Thanks

yes, i believe the voyager lfo is 0 to +5V

Hmm that would explain. I'll try to see whether offsetting the CP's LFO output works.

Thanks!!

Ok, got it! From the 8StepProgram manual:

The clock signal must be between 0V and 5V. If the clock signal goes below 0V, the 8-STEP may not be able to properly read the external clock signal.

Definitely trying to offset the CP's LFO output by +2.5V.

Couldn't you use the Four Input Mixer's offset knob of the CP251 to do that perhaps ? (or maybe one of the active attenuators for that matter ?)

Yep Alain, that's exactly what I've tried and it worked

You could put a rectifier on the output and make it go positive with the benefit of doubling clock rate.

Ture, but I don't think I have one. Is there a rectifier on the CP-251?

No that's one of the few things the cp251 can't do.

But, you can put a bridge rectifier chip inside the end of a patch cable and make a rectifier cable or put a rectifier in a small experimenter case with a couple of 1/4" jacks. (Use a bigger box and make a rectifier, passive attenuator, mult box. Whatever you desire. Easy stuff with no circuit card and minimal easy soldering. Great beginner stuff that is functional.)